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The most unsymmetrical system is

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Important Questions on Solid State

MEDIUM

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

The correct option for the number of body centred unit cells in all

14

types of Bravais lattice unit cells is:

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

The parameters of the unit cell of a substance are

a = 2.5, b = 3.0, c = 4.0, α = 90 °, β = 120 ° γ = 90 ° .

The crystal system of the substance is :

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

Which among the following is the most symmetrical crystal system?

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

Which among the following metals crystallises as a simple cube?

HARD

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

NaCl

is a

FCC

lattice where

{Na}^{+}

ions are at corner and face centre positions. Chloride ions are at edge centres and body centre positions. How many

NaCl

formula units will be in an unit cell

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

A compound

M_{p} X_{q}

has cubic close packing (

ccp

) arrangement of

X

. Its unit cell structure is shown below. The empirical formula of the compound is

Question Image

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

a, b, c

are the lengths of three edges of unit cell,

α

is the angle between side

b

and

c, β

is the angle between side

a

and

c

and

γ

is the angle between side

a

and

b,

what is the Bravais Lattice dimensions of a tetragonal crystal?

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

How many crystal system are there when

a \neq b \neq c

and

a = b = c

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

A compound formed by elements

X

and

Y

crystallises in the cubic structure, where

X

atoms are at the corners of a cube and

Y

atoms are at the centre of the body. The formula of the compounds is

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

F . C . C .

the cell is shared equally by how many unit cells?

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

In the face centered unit cell, the lattice points are present at

HARD

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

If the angle of incidence of X-ray of wavelength

3 Å

which produces a second order diffracted beam from the

(100)

planes in a simple cubic lattice with interlayer spacing

a = 6 Å i s 30^{o},

the angle of incidence that produces a first - order diffracted beam from the

(200)

planes is

MEDIUM

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

The

FCC -

crystal contains how many atoms in each unit cell?

MEDIUM

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

An element occurring in the

BCC

structure has

12.05 \times 10^{23}

unit cells. The total number of atoms of the element in these cells will be

MEDIUM

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

A match box exhibits

MEDIUM

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

In a solid

AB, A

atoms are in

ccp

arrangement and

B

atoms occupy all the octahedral sites. If two atoms from the opposite faces are removed, then the resultant stoichiometry of the compound is

A_{x} B_{y}

. The value of

x

is [nearest integer]

MEDIUM

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

Polonium (atomic mass

= 209

) crystallises in a simple cubic structure with a density of

9.32 g {cm}^{- 3}

. Its lattice parameter (in

pm

) is closest to

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

In which crystal system, the length of each edge (edge length) is same?

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

What are two types of crystal structures shown by ice at different pressures?

EASY

Chemistry>Physical Chemistry>Solid State>Crystal Lattice and Unit cells

Which primitive unit cell has unequal edge lengths

(a \neq b \neq c)

and all axial angles different from

90^{o}

The most unsymmetrical system is

Important Questions on Solid State

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